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Merge pull request #14499 from roberth/genericClosure-errors
`builtins.genericClosure`: improve errors
This commit is contained in:
John Ericson
GitHub
commit
5a97c00f29
25 changed files with 299 additions and 86 deletions
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@ -139,63 +139,6 @@ TEST_F(ErrorTraceTest, NestedThrows)
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#define ASSERT_DERIVATION_TRACE3(args, type, message, context1, context2) \
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ASSERT_TRACE4(args, type, message, context1, context2, DERIVATION_TRACE_HINTFMT("foo"))
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TEST_F(ErrorTraceTest, genericClosure)
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{
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ASSERT_TRACE2(
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"genericClosure 1",
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TypeError,
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HintFmt("expected a set but found %s: %s", "an integer", Uncolored(ANSI_CYAN "1" ANSI_NORMAL)),
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HintFmt("while evaluating the first argument passed to builtins.genericClosure"));
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ASSERT_TRACE2(
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"genericClosure {}",
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TypeError,
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HintFmt("attribute '%s' missing", "startSet"),
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HintFmt("in the attrset passed as argument to builtins.genericClosure"));
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ASSERT_TRACE2(
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"genericClosure { startSet = 1; }",
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TypeError,
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HintFmt("expected a list but found %s: %s", "an integer", Uncolored(ANSI_CYAN "1" ANSI_NORMAL)),
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HintFmt("while evaluating the 'startSet' attribute passed as argument to builtins.genericClosure"));
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ASSERT_TRACE2(
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"genericClosure { startSet = [{ key = 1;}]; operator = true; }",
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TypeError,
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HintFmt("expected a function but found %s: %s", "a Boolean", Uncolored(ANSI_CYAN "true" ANSI_NORMAL)),
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HintFmt("while evaluating the 'operator' attribute passed as argument to builtins.genericClosure"));
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ASSERT_TRACE2(
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"genericClosure { startSet = [{ key = 1;}]; operator = item: true; }",
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TypeError,
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HintFmt("expected a list but found %s: %s", "a Boolean", Uncolored(ANSI_CYAN "true" ANSI_NORMAL)),
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HintFmt("while evaluating the return value of the `operator` passed to builtins.genericClosure"));
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ASSERT_TRACE2(
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"genericClosure { startSet = [{ key = 1;}]; operator = item: [ true ]; }",
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TypeError,
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HintFmt("expected a set but found %s: %s", "a Boolean", Uncolored(ANSI_CYAN "true" ANSI_NORMAL)),
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HintFmt("while evaluating one of the elements generated by (or initially passed to) builtins.genericClosure"));
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ASSERT_TRACE2(
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"genericClosure { startSet = [{ key = 1;}]; operator = item: [ {} ]; }",
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TypeError,
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HintFmt("attribute '%s' missing", "key"),
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HintFmt("in one of the attrsets generated by (or initially passed to) builtins.genericClosure"));
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ASSERT_TRACE2(
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"genericClosure { startSet = [{ key = 1;}]; operator = item: [{ key = ''a''; }]; }",
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EvalError,
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HintFmt("cannot compare %s with %s", "a string", "an integer"),
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HintFmt("while comparing the `key` attributes of two genericClosure elements"));
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ASSERT_TRACE2(
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"genericClosure { startSet = [ true ]; operator = item: [{ key = ''a''; }]; }",
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TypeError,
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HintFmt("expected a set but found %s: %s", "a Boolean", Uncolored(ANSI_CYAN "true" ANSI_NORMAL)),
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HintFmt("while evaluating one of the elements generated by (or initially passed to) builtins.genericClosure"));
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}
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TEST_F(ErrorTraceTest, replaceStrings)
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{
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ASSERT_TRACE2(
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@ -1050,17 +993,35 @@ TEST_F(ErrorTraceTest, bitXor)
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TEST_F(ErrorTraceTest, lessThan)
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{
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ASSERT_TRACE1("lessThan 1 \"foo\"", EvalError, HintFmt("cannot compare %s with %s", "an integer", "a string"));
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ASSERT_TRACE1(
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"lessThan 1 \"foo\"",
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EvalError,
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HintFmt(
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"cannot compare %s with %s; values are %s and %s",
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"an integer",
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"a string",
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Uncolored(ANSI_CYAN "1" ANSI_NORMAL),
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Uncolored(ANSI_MAGENTA "\"foo\"" ANSI_NORMAL)));
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ASSERT_TRACE1(
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"lessThan {} {}",
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EvalError,
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HintFmt("cannot compare %s with %s; values of that type are incomparable", "a set", "a set"));
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HintFmt(
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"cannot compare %s with %s; values of that type are incomparable (values are %s and %s)",
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"a set",
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"a set",
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Uncolored("{ }"),
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Uncolored("{ }")));
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ASSERT_TRACE2(
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"lessThan [ 1 2 ] [ \"foo\" ]",
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EvalError,
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HintFmt("cannot compare %s with %s", "an integer", "a string"),
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HintFmt(
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"cannot compare %s with %s; values are %s and %s",
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"an integer",
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"a string",
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Uncolored(ANSI_CYAN "1" ANSI_NORMAL),
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Uncolored(ANSI_MAGENTA "\"foo\"" ANSI_NORMAL)),
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HintFmt("while comparing two list elements"));
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}
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@ -681,7 +681,14 @@ struct CompareValues
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if (v1->type() == nInt && v2->type() == nFloat)
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return v1->integer().value < v2->fpoint();
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if (v1->type() != v2->type())
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state.error<EvalError>("cannot compare %s with %s", showType(*v1), showType(*v2)).debugThrow();
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state
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.error<EvalError>(
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"cannot compare %s with %s; values are %s and %s",
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showType(*v1),
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showType(*v2),
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ValuePrinter(state, *v1, errorPrintOptions),
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ValuePrinter(state, *v2, errorPrintOptions))
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.debugThrow();
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// Allow selecting a subset of enum values
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wswitch-enum"
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@ -711,7 +718,11 @@ struct CompareValues
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default:
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state
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.error<EvalError>(
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"cannot compare %s with %s; values of that type are incomparable", showType(*v1), showType(*v2))
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"cannot compare %s with %s; values of that type are incomparable (values are %s and %s)",
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showType(*v1),
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showType(*v2),
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ValuePrinter(state, *v1, errorPrintOptions),
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ValuePrinter(state, *v2, errorPrintOptions))
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.debugThrow();
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#pragma GCC diagnostic pop
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}
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@ -757,31 +768,60 @@ static void prim_genericClosure(EvalState & state, const PosIdx pos, Value ** ar
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`workSet', adding the result to `workSet', continuing until
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no new elements are found. */
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ValueList res;
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// `doneKeys' doesn't need to be a GC root, because its values are
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// reachable from res.
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auto cmp = CompareValues(state, noPos, "while comparing the `key` attributes of two genericClosure elements");
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std::set<Value *, decltype(cmp)> doneKeys(cmp);
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// Track which element each key came from
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auto cmp = CompareValues(state, noPos, "");
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std::map<Value *, Value *, decltype(cmp)> keyToElem(cmp);
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while (!workSet.empty()) {
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Value * e = *(workSet.begin());
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workSet.pop_front();
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state.forceAttrs(
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*e,
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noPos,
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"while evaluating one of the elements generated by (or initially passed to) builtins.genericClosure");
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try {
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state.forceAttrs(*e, noPos, "");
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} catch (Error & err) {
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err.addTrace(nullptr, "in genericClosure element %s", ValuePrinter(state, *e, errorPrintOptions));
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throw;
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}
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auto key = state.getAttr(
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state.s.key,
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e->attrs(),
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"in one of the attrsets generated by (or initially passed to) builtins.genericClosure");
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const Attr * key;
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try {
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key = state.getAttr(state.s.key, e->attrs(), "");
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} catch (Error & err) {
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err.addTrace(nullptr, "in genericClosure element %s", ValuePrinter(state, *e, errorPrintOptions));
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throw;
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}
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state.forceValue(*key->value, noPos);
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if (!doneKeys.insert(key->value).second)
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try {
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auto [it, inserted] = keyToElem.insert({key->value, e});
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if (!inserted)
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continue;
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} catch (Error & err) {
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// Try to find which element we're comparing against
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Value * otherElem = nullptr;
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for (auto & [otherKey, elem] : keyToElem) {
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try {
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cmp(key->value, otherKey);
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} catch (Error &) {
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// Found the element we're comparing against
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otherElem = elem;
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break;
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}
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}
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if (otherElem) {
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// Traces are printed in reverse order; pre-swap them.
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err.addTrace(nullptr, "with element %s", ValuePrinter(state, *otherElem, errorPrintOptions));
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err.addTrace(nullptr, "while comparing element %s", ValuePrinter(state, *e, errorPrintOptions));
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} else {
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// Couldn't find the specific element, just show current
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err.addTrace(nullptr, "while checking key of element %s", ValuePrinter(state, *e, errorPrintOptions));
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}
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throw;
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}
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res.push_back(e);
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/* Call the `operator' function with `e' as argument. */
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Value newElements;
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try {
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state.callFunction(*op->value, {&e, 1}, newElements, noPos);
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state.forceList(
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newElements,
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@ -794,6 +834,14 @@ static void prim_genericClosure(EvalState & state, const PosIdx pos, Value ** ar
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// passed to builtins.genericClosure");
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workSet.push_back(elem);
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}
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} catch (Error & err) {
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err.addTrace(
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nullptr,
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"while calling %s on genericClosure element %s",
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state.symbols[state.s.operator_],
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ValuePrinter(state, *e, errorPrintOptions));
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throw;
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}
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}
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/* Create the result list. */
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@ -0,0 +1,18 @@
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error:
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… while calling the 'seq' builtin
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at /pwd/lang/eval-fail-genericClosure-deeply-nested-element.nix:25:1:
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24| in
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25| builtins.seq finiteVal (
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| ^
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26| builtins.genericClosure {
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… while calling the 'genericClosure' builtin
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at /pwd/lang/eval-fail-genericClosure-deeply-nested-element.nix:26:3:
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25| builtins.seq finiteVal (
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26| builtins.genericClosure {
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| ^
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27| startSet = [
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… in genericClosure element { finite = { a0 = { a1 = { a2 = { a3 = { a4 = { a5 = { a6 = { a7 = { a8 = { ... }; }; }; }; }; }; }; }; }; }; «1 attribute elided» }
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error: attribute 'key' missing
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@ -0,0 +1,35 @@
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let
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finite = {
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a0 = {
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a1 = {
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a2 = {
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a3 = {
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a4 = {
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a5 = {
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a6 = {
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a7 = {
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a8 = {
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a9 = "deep";
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};
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};
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};
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};
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};
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};
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};
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};
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};
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};
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finiteVal = builtins.deepSeq finite finite;
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in
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builtins.seq finiteVal (
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builtins.genericClosure {
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startSet = [
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{
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infinite = import ./infinite-nesting.nix;
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finite = finiteVal;
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}
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];
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operator = x: [ (import ./infinite-nesting.nix) ];
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}
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)
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@ -0,0 +1,10 @@
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error:
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… while calling the 'genericClosure' builtin
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at /pwd/lang/eval-fail-genericClosure-element-missing-key.nix:1:1:
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1| builtins.genericClosure {
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| ^
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2| startSet = [ { nokey = 1; } ];
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… in genericClosure element { nokey = 1; }
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error: attribute 'key' missing
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@ -0,0 +1,4 @@
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builtins.genericClosure {
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startSet = [ { nokey = 1; } ];
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operator = x: [ ];
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}
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@ -0,0 +1,10 @@
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error:
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… while calling the 'genericClosure' builtin
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at /pwd/lang/eval-fail-genericClosure-element-not-attrset.nix:1:1:
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1| builtins.genericClosure {
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| ^
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2| startSet = [ "not an attrset" ];
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… in genericClosure element "not an attrset"
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error: expected a set but found a string: "not an attrset"
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@ -0,0 +1,4 @@
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builtins.genericClosure {
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startSet = [ "not an attrset" ];
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operator = x: [ ];
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}
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@ -0,0 +1,12 @@
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error:
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… while calling the 'genericClosure' builtin
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at /pwd/lang/eval-fail-genericClosure-keys-incompatible-types.nix:1:1:
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1| builtins.genericClosure {
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| ^
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2| startSet = [
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… while comparing element { key = "string"; }
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… with element { key = 1; }
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error: cannot compare a string with an integer; values are "string" and 1
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@ -0,0 +1,7 @@
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builtins.genericClosure {
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startSet = [
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{ key = 1; }
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{ key = "string"; }
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];
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operator = x: [ ];
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}
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@ -0,0 +1,12 @@
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error:
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… while calling the 'genericClosure' builtin
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at /pwd/lang/eval-fail-genericClosure-keys-uncomparable.nix:1:1:
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1| builtins.genericClosure {
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| ^
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2| startSet = [
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… while comparing element { key = { }; }
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… with element { key = { }; }
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error: cannot compare a set with a set; values of that type are incomparable (values are { } and { })
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@ -0,0 +1,7 @@
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builtins.genericClosure {
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startSet = [
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{ key = { }; }
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{ key = { }; }
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];
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operator = x: [ ];
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}
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@ -0,0 +1,10 @@
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error:
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… while calling the 'genericClosure' builtin
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at /pwd/lang/eval-fail-genericClosure-missing-operator.nix:1:1:
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1| builtins.genericClosure {
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| ^
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2| startSet = [ { key = 1; } ];
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… in the attrset passed as argument to builtins.genericClosure
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error: attribute 'operator' missing
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|
|
@ -0,0 +1,3 @@
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builtins.genericClosure {
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startSet = [ { key = 1; } ];
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}
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|
|
@ -0,0 +1,10 @@
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error:
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… while calling the 'genericClosure' builtin
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at /pwd/lang/eval-fail-genericClosure-missing-startSet.nix:1:1:
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1| builtins.genericClosure {
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| ^
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2| operator = x: [ ];
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|
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… in the attrset passed as argument to builtins.genericClosure
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error: attribute 'startSet' missing
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|
|
@ -0,0 +1,3 @@
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builtins.genericClosure {
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operator = x: [ ];
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}
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|
|
@ -0,0 +1,10 @@
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error:
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… while calling the 'genericClosure' builtin
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at /pwd/lang/eval-fail-genericClosure-not-attrset.nix:1:1:
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1| builtins.genericClosure "not an attrset"
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| ^
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2|
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||||
|
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… while evaluating the first argument passed to builtins.genericClosure
|
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|
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error: expected a set but found a string: "not an attrset"
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|
|
@ -0,0 +1 @@
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builtins.genericClosure "not an attrset"
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|
|
@ -0,0 +1,10 @@
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error:
|
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… while calling the 'genericClosure' builtin
|
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at /pwd/lang/eval-fail-genericClosure-operator-not-function.nix:1:1:
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1| builtins.genericClosure {
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| ^
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2| startSet = [ { key = 1; } ];
|
||||
|
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… while evaluating the 'operator' attribute passed as argument to builtins.genericClosure
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error: expected a function but found a string: "not a function"
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|
|
@ -0,0 +1,4 @@
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builtins.genericClosure {
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startSet = [ { key = 1; } ];
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operator = "not a function";
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}
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|
|
@ -0,0 +1,12 @@
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error:
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… while calling the 'genericClosure' builtin
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at /pwd/lang/eval-fail-genericClosure-operator-not-list.nix:1:1:
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1| builtins.genericClosure {
|
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| ^
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||||
2| startSet = [ { key = 1; } ];
|
||||
|
||||
… while calling operator on genericClosure element { key = 1; }
|
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|
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… while evaluating the return value of the `operator` passed to builtins.genericClosure
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error: expected a list but found a string: "not a list"
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|
|
@ -0,0 +1,4 @@
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builtins.genericClosure {
|
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startSet = [ { key = 1; } ];
|
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operator = x: "not a list";
|
||||
}
|
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|
|
@ -0,0 +1,10 @@
|
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error:
|
||||
… while calling the 'genericClosure' builtin
|
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at /pwd/lang/eval-fail-genericClosure-startSet-not-list.nix:1:1:
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1| builtins.genericClosure {
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||||
| ^
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||||
2| startSet = "not a list";
|
||||
|
||||
… while evaluating the 'startSet' attribute passed as argument to builtins.genericClosure
|
||||
|
||||
error: expected a list but found a string: "not a list"
|
||||
|
|
@ -0,0 +1,4 @@
|
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builtins.genericClosure {
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startSet = "not a list";
|
||||
operator = x: [ ];
|
||||
}
|
||||
4
tests/functional/lang/infinite-nesting.nix
Normal file
4
tests/functional/lang/infinite-nesting.nix
Normal file
|
|
@ -0,0 +1,4 @@
|
|||
let
|
||||
mkInfinite = i: { "a${toString i}" = mkInfinite (i + 1); };
|
||||
in
|
||||
mkInfinite 0
|
||||
Loading…
Add table
Add a link
Reference in a new issue